Portable storage battery



FIG. 1 is a front elevational view of a portable storage battery showinga first embodiment;

FIG. 2 is a top plan view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a front elevational view of a portable storage battery showinga second embodiment;

FIG. 8 is a top plan view thereof;

FIG. 9 is a rear elevational view thereof;

FIG. 10 is a bottom plan view thereof;

FIG. 11 is a right side view thereof; and,

FIG. 12 is a left side view thereof.

The ornamental design for a portable storage battery, as shown anddescribed.